Penobscot, ME
Transparent derived index from EPA TRI / SDWIS / Superfund extracts: not an official EPA rating. Fixed caps: facilities ≤25 pts (50+ = max), log10 releases ≤25 pts, Superfund ≤25 pts (5/site), health-violation systems ≤15 pts (3/system), high-chemical facilities ≤10 pts. Bands: High ≥60, Moderate ≥30. See methodology.
Environmental data for Penobscot in Maine · Population: 153,571
TRI sites such as Nd Paper Inc.; Eldur Corp; Ge Vernova Bangor; SDWIS systems such as BANGOR WATER DISTRICT; BREWER WATER DEPARTMENT; OLD TOWN WATER DISTRICT; NPL sites such as Eastland Woolen Mill; West Site/Hows Corners anchor Penobscot, ME's EPA extract. Derived burden score 48/100 (Moderate Risk) uses fixed national caps on density, log release volume, Superfund count, and health-flagged systems - not an official EPA rating.
Health-flagged SDWIS rows in Penobscot include BREWER WATER DEPARTMENT; HAMPDEN WATER DISTRICT; DEXTER UTILITY DISTRICT, while Nd Paper Inc. leads reported TRI pounds among local Form R filers. AQS median AQI 33 / peak 84 in 2024.
Burden score 48/100 (Moderate Risk) is the only weighted composite on this page. The tables below list every TRI facility, SDWIS system, and Superfund site EPA has on record for Penobscot -- not just the names called out above -- reproducing the disclosure history as filed, not a current-safety verdict. Extract current as of 2026-08-25.
Release-over-release change
What changed for Penobscot, ME: EPA TRI 2023 reporting year
Same facilities, both years
-77.3%
5 facilities that filed in 2022 and 2023
Whole inventory
-77.3%
128.1 thousand lb → 29.0 thousand lb, every facility that filed
- Penobscot, ME's total reported releases fell from 128.1 thousand lb in 2022 to 29.0 thousand lb in 2023, based on EPA TRI filings.
- Penobscot, ME's off-site transfers fell from 596 lb in 2022 to 124 lb in 2023, based on EPA TRI filings.
- Penobscot, ME's water releases fell from 5.5 thousand lb in 2022 to 1.2 thousand lb in 2023, based on EPA TRI filings.
- Penobscot, ME's air releases fell from 122.0 thousand lb in 2022 to 27.7 thousand lb in 2023, based on EPA TRI filings.
Air Quality History (2020–2024)
EPA Air Quality Index (AQI) data showing how many days per year fall into each air quality category.
| Year | Good | Moderate | Unhealthy (SG) | Max AQI |
|---|---|---|---|---|
| 2024 | 328 (91%) | 34 | 0 | 84 |
| 2023 | 294 (82%) | 64 | 0 | 89 |
| 2022 | 324 (90%) | 37 | 0 | 87 |
| 2021 | 326 (90%) | 36 | 0 | 100 |
| 2020 | 338 (93%) | 25 | 0 | 76 |
Source: EPA Air Quality System (AQS) Annual AQI by County AQI categories: Good (0-50), Moderate (51-100), Unhealthy for Sensitive Groups (101-150), Unhealthy (151-200), Very Unhealthy (201-300), Hazardous (301+)
For real-time air quality readings and pollutant breakdowns in Maine, see the EPA's AirNow.gov.
Water Systems (44)
| System | System pop (SDWIS) | Violations |
|---|---|---|
| BANGOR WATER DISTRICT | 27,298 | 0 |
| BREWER WATER DEPARTMENT | 8,860 | 2 |
| OLD TOWN WATER DISTRICT | 7,648 | 0 |
| ORONO-VEAZIE WATER DISTRICT | 5,793 | 0 |
| HAMPDEN WATER DISTRICT | 4,628 | 1 |
| LINCOLN WATER DISTRICT | 3,020 | 0 |
| DEXTER UTILITY DISTRICT | 2,338 | 2 |
| EAST MILLINOCKET WATER WORKS | 2,133 | 0 |
| HOWLAND WATER DEPARTMENT | 1,025 | 0 |
| MOUNTAIN VIEW CORRECTIONAL FACILITY | 468 | 0 |
| PATTEN WATER DEPT | 338 | 0 |
| SUN HANCOCK HEIGHTS- EAST | 158 | 2 |
| COUNTRY MOBILE HOME PARK | 155 | 0 |
| SUN HANCOCK HEIGHTS-WEST | 155 | 0 |
| PLYMOUTH WATER DISTRICT | 150 | 0 |
| GRANDEUR MOBILE HOME ESTATES | 100 | 0 |
| SOUTH SLOPE ESTATES MHP | 100 | 0 |
| WOODED GROVE MOBILE HOME PARK | 90 | 0 |
| UNITY BY THE STREAM LLC | 88 | 43 |
| CORINNA WATER DISTRICT | 80 | 0 |
| WILLOWBROOK MOBILE HOME PARK | 75 | 0 |
| HAVASU PINES MHP | 75 | 0 |
| SCROGGINS MOBILE HOME PARK | 73 | 0 |
| HAVASU PINES MHP #1 | 65 | 0 |
| STREETS MOBILE HOME PARK | 65 | 0 |
| ROCKY RIDGE SUBDIVISION | 64 | 0 |
| BOULIER PLACE APTS | 60 | 2 |
| CORINTHIAN MANOR | 60 | 0 |
| DEER RUN APTS | 60 | 0 |
| SUNNY GABLES- GLENBURN HOUSING | 60 | 6 |
| TOWNE CENTER-RIDGEWOOD APARTMENTS | 60 | 0 |
| PERSISTENCE SENIORS HOUSING | 60 | 0 |
| FAIRGROUND APARTMENTS | 60 | 0 |
| TOWN HALL APTS - LAGRANGE | 60 | 0 |
| VIGNEAULTS MOBILE HOME PARK | 53 | 0 |
| GEORGE POND ESTATES LLC | 50 | 2 |
| MAPLE RIDGE MOBILE HOME PARK | 50 | 1 |
| HARRIMAN COVE PARK LLC | 45 | 0 |
| BENJAMIN RIVER APTS | 45 | 1 |
| ROCKY RIDGE SUBDIVISION II | 40 | 0 |
| FAITH BIBLE COLLEGE INTERNATIONAL | 35 | 0 |
| MATTAWAMKEAG HOUSING CORP | 33 | 1 |
| SKYLINE TRAILER PARK | 28 | 0 |
| EXETER WATER DEPARTMENT | 25 | 0 |
TRI Facilities (6)
| # | Facility | Total Releases |
|---|---|---|
| 1 | Nd Paper Inc. | 525.9K lbs |
| 2 | Eldur Corp | 6.9K lbs |
| 3 | Ge Vernova Bangor | 3.1K lbs |
| 4 | Ge Vernova Bangor | 707 lbs |
| 5 | U.S. Army Maine National Guard Bangor Training Site Range | 27 lbs |
| 6 | Brenntag Lubricants North East-Hampden | 0 lbs |
Superfund Sites (2)
| Site Name | Status | HRS Score |
|---|---|---|
| Eastland Woolen Mill | NPL Site | 70.71 |
| West Site/Hows Corners | NPL Site | 50.00 |
Cities in Penobscot (19)
Frequently Asked Questions
What is the environmental risk level in Penobscot, Maine? ▼
Are there Superfund sites in Penobscot? ▼
How many toxic release facilities are in Penobscot? ▼
What is the air quality in Penobscot? ▼
Is the drinking water safe in Penobscot? ▼
What environmental agencies cover Penobscot? ▼
What does this county environmental profile show?
This county environmental profile rolls up EPA Toxics Release Inventory facility reports, Safe Drinking Water Information System public-water-system filings, and Superfund National Priorities List sites for the county boundary defined by the U.S. Census Bureau. Facility counts reflect facilities with a reporting address inside the county, not where downstream environmental effects may be observed. Population figures are from the most recent Census ACS 5-year estimate. The county detail page is updated whenever the upstream EPA programs publish revised data; see the methodology page for the documented ingest cadence and the editorial choices governing how aggregations are computed.
Read our methodology - how this data is sourced, computed, and verified.